FastBitmapDrawable.java revision badf71e11fba2d6efa1d1bcca9542001f90a3777 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.launcher2;
18
19import android.graphics.Bitmap;
20import android.graphics.Canvas;
21import android.graphics.ColorFilter;
22import android.graphics.Paint;
23import android.graphics.PixelFormat;
24import android.graphics.Rect;
25import android.graphics.drawable.Drawable;
26
27class FastBitmapDrawable extends Drawable {
28    private Bitmap mBitmap;
29    private int mAlpha;
30    private int mWidth;
31    private int mHeight;
32    private final Paint mPaint = new Paint();
33
34    FastBitmapDrawable(Bitmap b) {
35	mAlpha = 255;
36        mBitmap = b;
37        if (b != null) {
38            mWidth = mBitmap.getWidth();
39            mHeight = mBitmap.getHeight();
40        } else {
41            mWidth = mHeight = 0;
42        }
43    }
44
45    @Override
46    public void draw(Canvas canvas) {
47        final Rect r = getBounds();
48        canvas.drawBitmap(mBitmap, r.left, r.top, mPaint);
49    }
50
51    @Override
52    public void setColorFilter(ColorFilter cf) {
53        mPaint.setColorFilter(cf);
54    }
55
56    @Override
57    public int getOpacity() {
58        return PixelFormat.TRANSLUCENT;
59    }
60
61    @Override
62    public void setAlpha(int alpha) {
63        mAlpha = alpha;
64        mPaint.setAlpha(alpha);
65    }
66
67    public int getAlpha() {
68        return mAlpha;
69    }
70
71    @Override
72    public int getIntrinsicWidth() {
73        return mWidth;
74    }
75
76    @Override
77    public int getIntrinsicHeight() {
78        return mHeight;
79    }
80
81    @Override
82    public int getMinimumWidth() {
83        return mWidth;
84    }
85
86    @Override
87    public int getMinimumHeight() {
88        return mHeight;
89    }
90
91    public void setBitmap(Bitmap b) {
92        mBitmap = b;
93        if (b != null) {
94            mWidth = mBitmap.getWidth();
95            mHeight = mBitmap.getHeight();
96        } else {
97            mWidth = mHeight = 0;
98        }
99    }
100
101    public Bitmap getBitmap() {
102        return mBitmap;
103    }
104}
105